RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:31321396 with event index number of 2274061

Geocentric closest approach at 2026/07/06 06:52:18 UTC

J2000 position of star is 18:02:19.8 -28:08:05
Equinox of date position of star is 18:03:46.4 -28:07:59
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 85 degrees from the moon. Moon is 66% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 32.1 AU from the Sun and 31.1 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is 1363 km.
The sky-plane scale is 22555.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 13.4 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2026/07/06 06:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.2 -26:29:18  0.9 20.69 106
34Ups Sco      17:32:34.1 -37:18:51  2.7 11.30  92
PPM 267912     18:09:45.7 -28:27:05  4.6  1.31  84
PPM 267738     18:04:34.6 -27:49:27  6.7  0.33  85
PPM 267712     18:03:48.2 -28:23:19  8.6  0.26  85
470593         18:04:00.3 -28:07:57 16.0        85
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 5.0 sigma about the mid-time.
The median site spacing is 15.2 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:52:17 -14.9 AT Up 11.1 176.8 Really Low 06:42:04 - 07:02:31 12174
Kelowna 06:52:14 -15.8 AT Up 12.0 177.6 Really Low 06:42:00 - 07:02:27 12154
Peachland 06:52:15 -15.8 AT Up 12.1 177.3 Really Low 06:42:01 - 07:02:28 12152
Summerland 06:52:15 -16.0 AT Up 12.2 177.4 Really Low 06:42:01 - 07:02:28 12149
Penticton 06:52:15 -16.1 AT Up 12.3 177.5 Really Low 06:42:01 - 07:02:28 12147
Oliver 06:52:14 -16.4 AT Up 12.6 177.5 Really Low 06:42:01 - 07:02:28 12139
Anarchist Mountain Observatory 06:52:14 -16.6 AT Up 12.8 177.6 Really Low 06:42:00 - 07:02:27 12135
Sleaford 06:51:33 -15.1 AT Up 9.2 189.5 Really Low 06:41:20 - 07:01:47 12128
Victoria 06:52:28 -16.2 AT Down 13.1 174.0 Really Low 06:42:14 - 07:02:41 12124
Okanogan 06:52:15 -17.2 AT Up 13.5 177.4 Really Low 06:42:01 - 07:02:28 12118
Brewster 06:52:15 -17.4 AT Up 13.7 177.2 Really Low 06:42:02 - 07:02:29 12111
Manson/Chelan 06:52:17 -17.6 AT Up 13.9 176.9 Really Low 06:42:03 - 07:02:30 12106
Wenatchee 06:52:17 -18.0 AT Up 14.4 176.8 Really Low 06:42:04 - 07:02:31 12094
Ellensburg 06:52:18 -18.3 Dark Up 14.8 176.6 Really Low 06:42:05 - 07:02:32 12083
Yakima 06:52:19 -18.7 Dark Up 15.2 176.5 Really Low 06:42:05 - 07:02:32 12071
Toppenish/White Swan 06:52:18 -18.9 Dark Up 15.4 176.7 Really Low 06:42:04 - 07:02:31 12064
PNWRO 06:52:13 -19.6 Dark Up 15.8 178.0 Really Low 06:41:59 - 07:02:26 12051
The Dalles 06:52:21 -19.5 Dark Up 16.2 176.0 Really Low 06:42:07 - 07:02:34 12041
Maupin 06:52:21 -19.9 Dark Up 16.6 176.0 Really Low 06:42:07 - 07:02:34 12029
Sisters 06:52:23 -20.6 Dark Up 17.4 175.6 Really Low 06:42:09 - 07:02:36 12001
Bend 06:52:22 -20.9 Dark Up 17.7 175.8 Really Low 06:42:08 - 07:02:35 11993
Oregon Observatory 06:52:22 -21.1 Dark Up 17.9 175.7 Really Low 06:42:09 - 07:02:36 11987
Chiloquin 06:52:25 -22.2 Dark Up 19.1 175.3 Really Low 06:42:11 - 07:02:38 11941
Klamath Falls 06:52:24 -22.5 Dark Up 19.5 175.3 Really Low 06:42:10 - 07:02:37 11928
Cedarville 06:52:19 -23.6 Dark Up 20.3 176.8 Low 06:42:05 - 07:02:32 11901
Fall River/Burney 06:52:23 -23.8 Dark Up 20.7 175.7 Low 06:42:09 - 07:02:36 11883
Greenville 06:52:22 -24.7 Dark Up 21.6 176.0 Low 06:42:08 - 07:02:35 11846
Gimple 06:52:23 -24.7 Dark Up 21.6 176.1 Low 06:42:09 - 07:02:36 11846
Quincy 06:52:22 -24.9 Dark Up 21.8 176.0 Low 06:42:09 - 07:02:36 11838
Portola 06:52:20 -25.2 Dark Up 22.0 176.5 Low 06:42:07 - 07:02:34 11833
Reno 06:52:18 -25.6 Dark Up 22.3 177.1 Low 06:42:04 - 07:02:31 11820
Carson City 06:52:18 -25.9 Dark Up 22.6 177.1 Low 06:42:04 - 07:02:31 11805
Yerington 06:52:16 -26.2 Dark Up 22.8 177.7 Low 06:42:03 - 07:02:30 11795
Gardnerville 06:52:18 -26.2 Dark Up 22.9 177.1 Low 06:42:04 - 07:02:31 11795
Hawthorne 06:52:14 -26.8 Dark Up 23.3 178.2 Low 06:42:00 - 07:02:27 11774
Lee Vining 06:52:16 -27.2 Dark Up 23.9 177.7 Low 06:42:03 - 07:02:30 11751
Dunrhomin 06:51:23 -27.0 Dark Up 20.8 190.7 Low 06:41:09 - 07:01:36 11751
CU-SBO 06:51:24 -27.2 Dark Up 21.1 190.6 Low 06:41:10 - 07:01:37 11741
Bishop 06:52:13 -28.0 Dark Up 24.5 178.4 Low 06:41:59 - 07:02:26 11721
Beatty 06:52:07 -28.8 Dark Up 25.0 180.0 Low 06:41:54 - 07:02:21 11694
Patrick 06:51:55 -30.8 Dark Up 26.4 182.8 Low 06:41:42 - 07:02:09 11607
Laughlin/Bullhead City 06:51:59 -30.9 Dark Up 26.7 182.1 Low 06:41:45 - 07:02:12 11598
Lake Havasu City 06:51:58 -31.6 Dark Up 27.3 182.3 Low 06:41:44 - 07:02:11 11563
Wildwood 06:52:15 -31.0 Dark Up 27.7 178.2 Low 06:42:01 - 07:02:28 11562
Idyllwild 06:52:07 -31.8 Dark Up 28.1 180.0 Low 06:41:54 - 07:02:21 11537
George/Scottsdale 06:51:48 -32.8 Dark Up 28.0 184.8 Low 06:41:35 - 07:02:02 11506
Calipatria 06:52:02 -32.7 Dark Up 28.7 181.2 Low 06:41:49 - 07:02:16 11498
Yuma 06:51:58 -33.3 Dark Up 29.1 182.1 Low 06:41:45 - 07:02:12 11470

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 470593, (2026/07/06 06:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.69 106
34Ups Sco      17:30:45.8 -37:17:46  2.7 11.30  92
PPM 267912     18:08:05.0 -28:27:26  4.6  1.31  84
PPM 267738     18:02:54.3 -27:49:36  6.7  0.33  85
PPM 267712     18:02:07.5 -28:23:26  8.6  0.26  85
470593         18:02:19.8 -28:08:05 16.0        85
Positions are for J2000

Event circumstances last updated at 2022/11/03 05:20:56 UT

Marc W. Buie, Southwest Research Institute

RECON